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arXiv 2409.09498math.STmath.PRstat.TH
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不规则观测长记忆过程的渐近性

Asymptotics for irregularly observed long memory processes

Mohamedou Ould-Haye, Anne Philippe

AI总结:

该研究探究了经更新过程不规则观测的平稳过程的渐近特性,明确了更新过程尾部特征对自归一化样本均值极限分布的影响,刻画了对应极限分布的形式与结构。

摘要:

我们研究了通过更新过程在不规则时间点观测平稳过程的影响。我们证实,观测过程的自归一化样本均值的渐近行为会因更新过程的不同而存在显著差异。具体而言,我们表明若更新过程具有中等重尾分布,则其极限为所谓的正态方差混合(NVM),且我们将极限NVM的随机化方差部分刻画为Lévy稳定运动的积分函数。否则,归一化样本均值将渐近服从正态分布。

英文摘要:

We study the effect of observing a stationary process at irregular time points via a renewal process. We establish a sharp difference in the asymptotic behaviour of the self-normalized sample mean of the observed process depending on the renewal process. In particular, we show that if the renewal process has a moderate heavy tail distribution then the limit is a so-called Normal Variance Mixture (NVM) and we characterize the randomized variance part of the limiting NVM as an integral function of a Lévy stable motion. Otherwise, the normalized sample mean will be asymptotically normal.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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